de Beaudrap, Niel. “On Restricted Unitary Cayley Graphs and Symplectic Transformations Modulo $n$”. The Electronic Journal of Combinatorics 17, no. 1 (May 7, 2010): #R69. Accessed June 1, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v17i1r69.